high CPU when ssh server shuts down

high CPU when ssh server shuts down

ssh server is fedora 15
I connect with winscp gui , ssh protocol , transfer some files from server to local machine then server goes down (i.e i issue in a separate putty window <su -c "halt -p"> )
now local machine enters 100% and being a laptop it really starts to feel hot .
Closing winscp process from task manager brings down cpu to acceptable levels.